Horde Groupware Webmail Edition is a free, web-based email app. Notable for its versatility, Horde is compatible with the LAMP/LEMP stack and external emails like Google, Yahoo, and SMTP. Additional features include IMAP and SMTP protocols support, integration for popular services, and advanced customization through plugins. It also offers a simple installation and upgrade process. Instructions on how to install Horde on an Ubuntu server involving the installation and configuration of Apache2 HTTP Server, MariaDB Database Server, and PHP 7.2 are provided.